Watched it all yesterday , and it's a really well done, series, especially for 2024 . For anyone wondering because it is a Netflix series, there is no "agenda" being pushed at you like you'd expect.
On the firearms side of things it shows a mix of caplock rifles and flintlock rifles but mostly you see the1851 Navy, though I sware I saw a few brass framed versions which I didn't think were produced in 1857. There is a scene where they empty their pistols and fumble to reload at night on horseback with cold hands, an accurate detail. No pistol shot more than 6 shots which made more believable than the usual endless firing six gun of other movies.
I give it two thumbs up and highly recommended it.